Start-stop code transmitter



June 24, 1941. a C I 2,247,162

J START-STOP CODE TRANSMITTER Filed July 22, 1938' 6 Sheets-Sheet I r Oas 45 14 4'6 [1 IN I o o 1 33 2a 4a a YWQ/I'Vt/OO GIUSEPPE BECCIO.

June 24, 1941. e. BE CCIO START-STOP CODE TRANSMITTER Filed July 22,1938 6 Sheets-Sheet 2 gvwem/foa GIUSIEPPE BECCIO.

June 24, 1941. G. BECCIO START-STOP CODE TRANSMITTER Filed July 22,1938' 6 Sheets-Sheet 3 3 H4: em tw GIc/SEPPE BEcc/o.

June 24, 1941. BECCIO 2,247,162

START-STOP CODE TRANSMITTER F iled July 22, 1938 e Sheets-Sheet 4 JUNE24-, G, C Q START- STOP CODE TRANSMITTER Filed July 22 1958 aSheets-Sheet 5 3 1 1 0 M4404; GIUJSEPPE BE cc/o.

June 24;, 19411. G. BECCIO 2,247,H62

START-STOP CODE TRANSMITTER Filed July 22, 1938 6 Sheets-Sheet s GwsEPPEBaa/o.

Patented June 24, 1941 START-STOP CODE TRANSMITTER GiuseppeBeccioylvrea,Italy, assignor to Firm Ing. C. ()livettikiz 0., S. A., Ivrea, ItalyApplication -July 22, 1938, Serial No.I220,682

. In Italy May 2, 1938 9 Claims.

This invention relates to the mechanism for the transmission of signalsin machinesof the 'unrhythmical type known as start-stop andcontrollable from a distance, in which the depression of each key of thekeyboard brings about the displacement of ,five code bars'to form anyone of 32 possible combinations each corresponding to a signahand ofwhich areallocated to the operation of the machine for the purpose of(1) spacing the letters, (2) lines feeding (3 shiftingthe letters tosymbols and vice-versa (4) carriage returning. The remaining 27combination'seach correspond to two signals, one a letter and the othera symbol. 1

In these machines the depression of each key efiects the composition ofthe corresponding code and the making of a connection which sets aseries of suitably spaced cams into rotation, these cams serving tospread over a given period of time and to send into the line theelectrical current transmission impulses which reproduce the formedcode, as Well as the two impulses for the starting and stopping of thereceiving apparatus.

In those machines in, which'the code bars directly transmit theselection of impulses, a-neW code cannot be produced until theimmediately preceding code has been entirely transmitted, and for thepurpose of avoiding this possibility these machines normally embody ablocking arrangement which prevents the too rapid depression of one keyafter another. Asa consequence it is necessary for the operator to carryout the transmission with extreme regularity in order to achieve thegreatest operating speed which the machine will permit, and this is onlyachieved in exceptional cases. Furthermore in known machines thechange-over from letters to symbols is carried out by depressing-specialkeys, and very close attention on the part of the operator is called forif no attempt to write letters is made when the machine is set forsymbols and viceversa, Mistakes of this kind can be prevented by the useof suitable blocking arrangements, or one may equally well employ thetwo supplementary keys described below.

The arrangement according 'to the invention enables two keys to beoperated in succession in less time than is necessaryior thetransmission of a signal and with a variation of the regularity of therhythm which is necessary with known machines, so that it is madepossible to attain a mean speed of operationwhich is very close to themaximum speed possible with the machine, and even by inexperiencedoperators.

The invent-ion further provides'for the automatic change-over from theposition of letters to that of symbols and vice-versa when, after thetransmission of a certain number of letters or symbols it is required totransmit symbols or letters. Upon each conversion of this kind thetransmitting apparatus automatic-ally emits the code symbols or the codeletters, whilst the codeof the symbol or of the letter remainsregistered or stored in the transmitting apparatus and is transmitted assoon as the change-over has been effected. In this way, upon thedepression of a key corresponding to a symbol, or to a letter,

after letters or symbols have been transmitted,

the camshaft makes two revolutions instead of one and during the firstrevolution transmits the code symbols or the code letters whilst duringthe second rotation there is transmitted the code of the symbol or ofthe letter corresponding to the key which was depressed.

The nature of the invention will be better understood from aconsideration of the accompanying drawings, in which i Fig. 1 shows theapparatus at rest;

Figs. 2 and 3 show the apparatus in two positions which they may occupyduring the transmission of a code;

Figs. 4, 5, 10 and 11 show various operative positions of the mechanismfor effecting the automatic change-over from letters to symbols;

Figs. 6, 7, 8 and 9 show details of the mechanism;

Figs. 12 and 13 show an arrangement for pre-'- venting the release ofthe group of cams during the change-over;

Figs. 14 and 15 illustrate an arrangement controlling the ultimatedisplacement of the commutating bar when the machine operates with anautomatic response.

Figs. 16 and 17 show a modified arrangement permitting an increase inthe speed of operation.

It is necessary, however, to consider the manner in which the results oftwo successive key depressions are registered or collected. Fig. 1 showsthis arrangement at rest. The five code bars I'provided with teeth 2which are inclined from right to left, are displaced from right to leftas a re sult of the depression of one of the key levers '3. These barsslide upon the'pins 5 which engage in slots 6 to determine the finalpositions at the right or at the left.

A universal bar I provided with pivot pins is mounted parallel to thecode bars I. Bar 1 is also provided with teeth which are inclined in allcases towards the right so that the depression of any key effects adisplacement of the bar 1 towards the left. After the operation of thekey the spring 8 serves to return the bar I to the right. The bar I ispivotally connected at 9 with a balance beam III which is capable ofoscillating about an axis II. To this balance beam is connected atoothed pawl I3 through the medium of a pivot I2. A spring I4 urges thepawl I3 downwards in such a manner as to cause it to engage with theoutwardly bent extremity I5 of a lever I6 which is rigidly connected,through the medium of a spindle II,

with a lever I8 which, when displaced in such a manner that its lowerend moves to the right, disengages itself from a tooth I3 on thecoupling member which effects the rotation of the shaft carrying thetransmission cams. It will be seen that the displacement of the bar I tothe left effects a displacement to the right of lever I8 and alsoeffects the rotation of the camshaft 20 which is arranged to make onecomplete revolution for each signal transmitted. The extremity 2I of thepawl I 3. however, does not move from the path of the projection on cam22, and thus even if the key is maintained depressed for a period oftime which is greater than that necessary for the complete rotation ofthe camshaft, the pawl I3 is raised and disengaged from lever I 6 sothat the extremity of lever I8 is urged by the spring 23 to re-enter theposition shown, thus breaking or opening the coupling when the rotationhas been completed. When the key is released the Whole system returns tothe normal position under the tension spring 8 and the tooth of the pawlI3 engages with the tooth. I5 to reestablish the initial conditions forthe despatch of a further signal. Upon the shaft 20 is fixed a cam '24which actuates a roller 25 mounted upon a lever 25 arranged to oscillateabout an axis 21. A link 28 connects lever 26 with a further lever 29which is rigidly mounted upon a shaft 30 upon which is also rigidlymounted a frame 3I which embraces five levers 33 arranged parallel toone another and corresponding respectively to the code bars. The ends 34of the levers 33 are formed with points which lie opposite to theextremities 4 of the code bars, which are also pointed. Each of thelevers 33 is connected to the frame across five springs 32 and through apivot 36 with a corresponding balance beam 31 which is capable ofrocking about an axis 38. The five balance beams 31 are" in turnconnected respectively through a pivot 39 to five slides 40 which movethrough the engagement of slots therein with guide pins 4| and 42.

At the commencement of rotation of the shaft 20 the cam 24, through themechanism described, effects a displacement of the frame 3I and alsothrough the springs 32 of the five levers 33, and thelatter are causedto engage by their pointed ends 34 against either the right or the left.hand face of the pointed ends 4 of the code bars.. The face engaged withdepends upon the position which the code bars have taken up. As aresult, the levers 33 are displaced to the right or to the left and thebalance beam 31 is caused to rock to move the slides 40 which reproducethe code formed by the bars I.

In Figs. 2 and 3 is illustrated the manner in which the displacement ofthe slides in one direction or the other is produced according as thecode bars have been moved to the right or to the left.

Opposite the slides 40 (Fig. 1) are arranged five levers 43 which arecapable of oscillating about an axis 44 and are so urged by springs 45that a projection 46 on each is maintained in engagement with therespective cams 41 which are suitably freed. In view of the necessity ofproviding for the automatic commutation as is described below, thecentral one of the five levers 43 consists of a single piece as shown inFig. 6, while the others are each formed of two pieces 43 and 5fl asshown in Figs. 7 and 8 connected to one another after the manner oftongs by a pivot 48. The pivot 49 which is interposed between the twopieces has the effect of renderin'g them rigid with regard to oneanother and prevents the raising of the projection 46 until the slideengages with the extremity 50. The projection 46 may enter into adepression in the cam' 41 and the lever acts in known manner upon theelectrical contacts on the frame only when the slide 40 lies in theposition towards the right, whilst in the reverse case the frame 5|responds to the spring 52 and the electrical contact is made to theleft. As soon as the high part 'of the cam 24 is moved from the roller25, the spring 53 serves to lower the ends 34 of the levers 33, thusdisengaging the points 34 on the code bars so that the latter becomefree for the formation of a further signal corresponding to thedepression of a further key, and this signal will remain registereduntil the cam 24 at the end of the rotation effected for the purpose oftransmitting the preceding signal, brings about the transfer 'of thecode to the slides 43.

It is important to note that during transmis'- sion of a signal theslides 40 are maintained in position directly by the pins 4 and 34(Figs. 2 and 3) and afterwards by the frame 3I and the teeth 35 (Fig.1"); without ever being freed as a result of the elastic connectionbetween the frame 3I and :the 'levers 33 achieved by the springs 32, sothat the positions of the slides remain always quite definite and fixedthrough the period of transmission of the signal.

It will be obvious that by varying the angular length of the operative"projecting portion of the cam 24, the time may be varied after which asuccessive signal can be registered, to remain stored duringthe'preceding transmission. It is, however, always essential that thenew registration shall not be carried out before the cam 22 hasdisengaged the tooth of the pawl I3 from the tooth l5 and the systemcomprising the bars I, the balance beam III and the pawl I3 has returned to its rest position, so that the succeeding depression of a keydisengages the coupling anew to permit it to efiect a further rotation.

The manner in which the automatic commutation arrangement operates cannow be seen. For greater clearness that part of the mechanism which isconcerned with the commutation is shown separately from the rest inFigs. 4 to 17. In the position of Fig. 4 the mechanism is arranged forthe transmission of letters. Thecodes formed by the bars ,I (Fig. 1) aretransferred to the slides 40 by the mechanism described above and whichis therefore not shown in these figures, and thereafter they aretransmitted. Beneath the key levers 3 which are parallel to the abovedescribed bars and similarly mounted upon the pivots 55, is mounted abar 54 provided with teeth 2 which are inclined to the right beneath thesymbols key levers, and to the left beneath the letters key levers. If asymbol key is depressed after one has written letters, the bar 54 isdisplaced towards the .left and remains thereduring the .time'that allsucceeding symbols are written. It returns to the right when a letterkey is depressed and remains there throughout the writing of succeedingletters. The roller 55 which is urged by a spring 56 against a tooth 51retains the bar in the one or the other of these positions. The bar 54,through the medium of the pivotal connection 58, controls the threearmedlever 59 which is arranged to rock about a pivot 60. The arm 6| servesthrough a link 62 to control the movements of a frame 63 which ismounted to rock about an axis 64 and which at its upper end carries atransverse member III! which extends over all the slides 40. The arm 65controls a frame 66 which is rockable about an axis 61. Frame 66 is of aform which presents an arm 68 upon which four levers 69 are pivoted.Each of these levers supports a pivot 49 which is interposed betweenparts 43 and which form the first pair and the last pair of the group offive levers 43. When the pivots 49 are interposed between the extensionsIll and 'II of these levers, these levers bring about a transmissionjust as though they were formed in one piece.

A tooth I2 is formed integral with frame 63 and this tooth is adapted toengage with a tooth 53 on the one-piece central lever 43 having theshape shown in Fig. 6. The axis 61 is not fixed, but is mounted upon aframe 13 arranged to pivot about an axis I4. formed rigid with this sameframe. The first mentioned lever 15, together with a spring 11, controlsthe frame I8 in its movements about the axis I9. The frame I8, likeframe I3, is provided with a sideways extension which extends over theslides 40. The second mentioned lever 16 is subjected through the mediumof a link 80 to the movement of the carrier for the characters or of thecarriage of the machine, or in otherwords, the member of the printingpart of the machine which takes up two different positions for printingthe letters or symbols. The machine is adapted to print letters when thelever It is in the position shown and symbols when in the positionindicated in dotted lines in Fig. 4.

In Figs. 1, 2, 3 and 9 the slides are shown as being provided with slotswhich engage over pivot pins 4| and 42 so arranged as to permit onlyhorizontal displacement of the slides. these slots are of the form shownin Fig. 4 and the following figures, the slot co-operating with pin IIbeing such as to permit only straight-line movements whilst the otherslot permits movements in an upward direction. Such upward movements,however, do not take place so long as one of the two frames 63 and I8lies over the projections on the slides, and only when these conditionsare imposed, are the slides adapted to prevent the lifting of the teeth50 and as a consequence accomplish their operation.

Assuming that a key corresponding to a symbol is depressed, the codebars which are then operated according to the code corresponding to thatsymbol effect an immediate registration by transposition to the slides40. As the code bars are moved, the bar 54 is also moved from theposition shown in Fig. 4 to that shown in Fig. 5, together with allthose members which are dependent thereon, these members also beingmoved to the position shown in Fig. 5. As can be seen from this figure,all the pivots 49 are lowered until they are no longer interposedbetween the extensions 10, H of the levers 43, so that the slides 45even though upon the teeth 50 cannot Levers I5 and I6 are Actuallyprevent the projections on the levers 43 from following the cam 41 (Fig.9). At the same time the hook I2 makes stopping engagement with thetooth 53 so that the central lever cannot rise, even though thecorresponding slide is free of it. To sum up, therefore, whatever symbolis formed, during the first rotation of the cams, the code transmittedwill be the result of the two first and the two last of the five levers43 which rise as a result of following the profile of the respectivecams 41, whilst the centre lever remains anchored. This code is thesymbol code which produces in the printing part of the apparatus thedisplacement from the position of.

letters to the position symbols. Meanwhile the code corresponding to theregistered symbol remains at the dispositions of the slides 40. Thisdisplacement of the printing part of the apparatus resulting from thetransmission of the symbol code, has the following results:

I. The link descends and causes the frame 15 to oscillate on the axisI4, taking with it the pivots 49, the hook l2 and the frame I8 into theposition shown in Fig. 10. The pivots 49 entering anew between theextensions 10, H, the hook I2 is withdrawn so that it no longer retainsthe teeth 53.

II. The lever 82 (Fig. 12) fixed on the shaft 14 and terminating in apoint, causes during its movement on the pivot 14, an oscillation of acranked lever I33 arranged to rock on a pivot I04. This lever isarranged to make a return movement under the tension spring I05 to itsrest position as soon as the point of the lever 82 has moved past thepin Itt by which it controls the lever I83. As a result of itsoscillation, lever 13 raises a pointer 83 which is normally held by aspring III! in engagement with a fixed abutment I08. This pointer isprovided with a projection shaped as shown in the drawings, and isconnected with a pneumatic brake formed by a cylinder 85 in which ismounted a movable piston fitted with a valve H3 which when open permitsthe rapid movement of the piston towards the right,

" whilst movement in the opposite direction is braked by the vacuumcaused in the cylinder as a result of the constricted air entry apertureI I4. This arrangement will be described later. If the pointer 83 isassumed to be displaced to the right as shown in Fig. 13, whilst theprinting member is displaced and the levers "IE, 82 are rocked, thelifting of the pointer brings about the movement of a lever I I5 whichis rigidly connected with a further pointer I8 and this serves to againfree the coupling in such a manner as to permit a further rotation ofthe camshaft. During this rotation the code signal which had alreadybeen registered by the slides, is transmitted.

As has already been stated, the pointer 83 is normally to be found inits position to the left as a result of the tension of the spring I07.In this position the raising of the pointer is Without any effect uponthe lever H5 in View of the shape of the latter. However, in thetransmitting.

machine the transmission camshaft has, as a result of the depression ofa symbol key, already made a rotation. As the result of this rotation apivot H6 provided on the coupling has operated upon the projection I 09on the lever 83 so that this lever is displaced from the position inwhich it is shown in Fig. 12 to that shown in Fig. 13. A moment later,lever 83 is raised to free the coupling as a result of the pneumaticbrake not being able to resume its position of rest. Conversely, in thereceiving machine the conversion from letters to symbols has taken placeas a resuit-of the code received, but the camshaft being stationary, thelever 83 is in contact with the pivot I08and the raising produced as aresult of the displacement is without effect upon the coupling so thatthe latter is not freed to move. This of course is essential in orderthat the machine which is in condition for reception shall not in itsturn transmit a code and upset the operation. It is topbe noted that inthe transmitting machine wherein the camshaft makes a rotation for eachcode transmitted, the pivot I I6 slides during each rotation against theprojection I09 so that the lever 83 is always urged towards the right,which in practice, as a result of the delay imposed upon the movementthereof by the brake 85, remains stationary in this position and itresponds to the spring I01 only when the transmission is finished.Naturally the air brake may be substituted by any other suitablearrangement depending upon friction or inertia or the like to delay thereturn of the lever 83 to its position of rest under the action ofspring II.

It can now be seen how the automatic transference from symbols toletters is effected, by reference to Fig. 10 wherein the mechanism isshown as arranged for the transmission of symbols. 0n the depression ofa key corresponding to a letter, the bar 54 is carried to the right andall the parts which depend for their operation upon this member aremoved to the position shown in Fig. 11. However, whatever the code whichhas been registered by the slides, given that the lateral extensions H0and H I of the frames 83 and I8 have been displaced by the projections8I on-the slides, these slides cannot prevent the tooth 50 from risingin following the profile of the cam, but they will themselves be raisedso that the code transmitted will be simply the code letters. The slidestherefore are moved to the position indicated in dotted lines in Fig.11.

This code brings about the necessary displacement of the printingmember, and as a result of the movement of link 80 the mechanism returnsto the position of Fig. 4. Similarly, the lever 82 (Fig. 8) effects adisplacement of the pointer I8 and a further rotation of the camshaft,and during-this rotation the code registered at the slides andcorresponding to the letter to be transmitted, is-transmitted, whilstthe lateral extension III of the frame I8 extends over the projectionson the said slides to prevent the latter from rising.

It is to be understood that in automatic responding machines the call ismade with the machine set in the position symbols.

Upon th automatic response drum there are arranged the codes to betransmitted which act in succession upon the teeth 86 through the mediumof mechanism provided for this purpose. It may happen, however, that thedcspatch of codes symbols or letters will not be produced as a result ofthe displacement of the bar 55 but by the automatic response drum. It istherefore necessary that the bar 54 shall take up the appropriateposition, since it will not be possible to transmit letters when the bar54 is in the position corresponding to symbols, or vice versa. The bar54 is provided with two lugs 81 and 88 which carry teeth 89 and 90 whichare arranged to rock on pivots SI and 92. Springs 93 and 94 serverespectively to maintain these teeth in engagement with stops 95 and 96.The frame I3 is connected icy alink 91 with lever 98 pivoted upon aspindle 99, and this lever carriesa pin I00 at its extremity in aposition where it can operate upon the teeth 89 and 90. The position ofthe bar 54 in Fig. 14 corresponds to the position letters. When a symbolkey is depressed the bar is moved to the left and the pin I00 movesagainst the tooth 90. During the movement of the machine to the positionsymbols the pin I08 depresses the tooth 90, expanding the spring 94, andmoves into the position shown in Fig. 15, whereupon the tooth 90 returnsto its normal position. If, however, the displacement to the positionsymbols is not brought about through the medium of the bar 54 but underthe control of the automatic response drum, the pin I00 slides whilstmoving downwards upon an inclined shoulder on the tooth 89, thusbringing about a displacement of the :bar 54 such that the finalposition thereof will again be that shown in Fig. 15. Similarly, ondeparting from this figure one arrives at the position indicated.

in Fig. 14 whether the code position letters is produced through themedium of the bar 54, or whether this code, is emitted by the automaticresponse drum.

The speed of operation of the machine may, however, be increased bykeeping the time required for effecting the automatic change from theletters position to the symbols position to a minimum, and this resultmay be achieved by the use of the arrangement illustrated in Figs. 16and 17. It has already been seen how the displacement of the carriage orof the plate hearing the characters, for adjustments between the lettersand symbols positions, by acting upon the link brings the transmissionmechanism back into the condition for transmission of the signalpreviously registered and for subsequent normal transmission. At themoment of automatic change-over therefore, an interruption of thetransmission occurs since inevitably the carrying out of thetransmission of the code letters or symbols must be awaited as well asthe execution of movement by the machine parts.

This disadvantage may be overcome by substituting for the link 86 anarrangement which is the equivalent thereof but which is controlled bythe receiving code bars as soon as these bars have reached the positioncorresponding to the letters code or to the symbols code.

Since the receiving code bars under the conditions being considered takeup the position which corresponds to the code transmitted immediatelyafter the reception of the last impulse, all loss of time is eliminated.

In this arrangement, there are connected to the five code 'bars I20,five cranked levers I2I pivoted at I22 and these are made to rock as aresult of the longitudinal displacement of the bars. The levers I2I areall shaped as shown in the drawings with the exception of the centrallever which has the shape shown in dotted lines. Upon shaft 14, lever"I6 is no longer provided but it is substituted by two arms I36 and I24disposed in two different planes and connected respectively throughlinks I23 and I25 to two frames I26 and I21 arranged to rock on an axisI28 and tending to turnin clockwisedirection under the influence ofsprings I29 and I30.

The frames I26 and I21 are held at rest by a stop I31 projecting from alever I3I pivoted at one end' at I32 and controlled at the other end bya cam J33 mounted on the shaft I34 which controls the printing mechanismand which is consequently set in motion at the instant that the codebars I have reached their position, and is stopped after a completeoscillation.

It should :be noted that the connections between the links I23 and I andthe arms I33 and I24 are pin and elongated slot connections to obtain adelayed action.

The cam I33 is provided with a projection of which the angulardevelopment is reduced. A roller I carried at the end of lever I3I restsagainst this projection and the arrangement is such thatat the momentwhen the lever I34 is moved, the lever I3I moves away from the framesI23 and I2! which therefore move to a position against lever I 2| r If acode letters has been formed upon the bars I26, the frame I26 becomesfree to respond to its spring I29, whilst if a symbol code is formed theframe I21 responds tospring I3il. For any other code combinationhowever, at least one of the levers I2I prevents rotation of theseframes. The levers I 2| form in fact movable extensions of the code barsI20. A further arrangement of the parts will enable the code barsthemselves to control the rotation of the frames I26 and I2!. In theposition shown in Fig. 17 the frame I21 has moved itself during thebeginning of the rotation of cam I33 taking with it the link I25 andcausing all the parts connected therewith to rotate.

The elongated slot formed in the link I25 permits the frame to resumeits position of rest under the action of the cam I33 and the lever I3Iwithout the movement thereof being transmitted to the arm I24. When aletters code has been formed, the frame I26 may turn, to bring about amovement in the opposite direction of the shaft 14, thus moving themechanism into the position for the transmission of letters.

What I claim is:

1. A printing telegraph machine for producing a code of a plurality ofimpulses comprising operating keys divided into two groups respectively,letters and marks; combination bars actuated by said keys, a cam shaftcarrying cams, means for starting rotation of said cam shaft by theoperation of a key and adapted to stop said shaft after one revolution,sliding members, means actuated by said cams for transferringsimultaneously at the beginning of the revolution the sode registcred insaid bars to said sliding members for releasing said bars for a furtherregistration, a transmission switch, levers actuated in succession bysaid cams and controlling said transmission switch depending upon theposition of said sliding members, a universal permutation bardisplaceable lengthwise to two positions, means actuated by thedisplacement of said permutation bar to prevent said levers controllingsaid transmission switch tobe controlled by the position of said slidingmembers during the revolution of said cam shaft, means to bring saidlevers back under the control of said sliding members after saidrevolution of said cam shaft, and means to control said latter meansthrough the receiving and printing part of the machine.

2. In a transmitter for code printing telegraph machine comprisingoperating keys divided into two groups respectively, letters and marks;combination bars having wedges and actuated by said keys, a shaftcarrying cams, means for starting rotation of said cam shaft causing itto perform one revolution, sliding members, means actuated by one ofsaid cams for transferring simultaneously with the beginning of therevolution said code registered by said bars 20 Said sliding members forreleasing said bars for a further registration, said means comprising abalance beam and levers hinged thereon provided with a bevel and adaptedto act on either side of said wedges, and a resilient connection anduniversal frame actuated by a cam of the cam shaft for bringing togethersaid levers to act on the wedges of said bars.

3. In a code printing telegraph machine comprising operating keysdivided into two groups respectively, letters and marks; combinationbars actuated by said keys, a shaft carrying cam means, sliding members,means for starting rotation of said shaft by actuating a key, meansactuated by one of said cam means for transferring simultaneously withthe beginning of the revolution the code registered by said bars to saidsliding members releasing said bars for a further registration, atransmission switch, five levers actuated in succession by said cammeans and controlling said transmission switch dependent upon theposition of said sliding members, the first two and the last two of saidlevers consisting each of two rotatably connected parts havingextensions, and means for rendering the two parts having extensionsrigid relatively to the corresponding sliding members, said latter meansconsisting of a pivot pin adapted to be interposed between saidextensions of said parts.

4. In a printing telegraph machine having five levers actuated insuccession by cams of a cam shaft and controlling a transmission switchwherein the two first and. the last two of said levers each comprisestwo rotatably connected parts and a projection, the central lever beingprovided with a hook-like projection; pivot pins adapted to be insertedbetween projections of said levers to render the same rigid, two groupsof keys in the key-board, a universal bar actuated by said keys anddisplaceable lengthwise to two positions according to whether isactuated a key of one group or the other, an oscillatable member bearingthe pivots and a hook, said member oscillating upon the lengthwisedisplacement of said universal bar, disengaging the pivots from saidprojections of the levers and engaging during said oscillation said:central lever by said hook.

5. In a printing telegraph machine having five transmission leversactuated by a cam shaft and controlling a transmission switch whereofthe first two levers and the last two levers are divided into two partsand the central one is provided with a hook; an oscillatable memberbearing pivot pins adapted to be inserted between the two parts of saidfirst two and said last two levers, respectively, and a hook adapted toengage with said hook of the central lever, said member being adapted toperform a revolution whereby said pivot pins being disengageable fromsaid levers and engageable by said hook of said central lever uponoscillation of said member, a lever carrying said member andoscillatable for returning said pivots to a position between said leversand for disengaging central lever from said hook.

6. In a code printing telegraph machine comprising operating keysdivided into two groups respectively, letters and marks; combinationbars actuated by said keys, a permutation universal bar actuated by saidkeys and displaceable to two positions dependent upon which group ofkeys is actuated, sliding members lengthwisely displaceable between twolimit positions, and means on said members for transferring said coderegistered by said bars, said members being ing vertical movement ofsaid members, the said universal permutation bar controlling oscillatingmovement of said frame.

9. In a code telegraph printing machine com-.

prising operating keys divided into two groups; combination barsactuatable by said keys, sliding members movable in vertical directionand upon which said code is transferable from said bars, elementsconnected to the receiving and printing parts of the machine, a secondframe oscillatable upon a journal between two limit positions, saidframe in one of said positions preventing vertical movement of saidsliding members, said elements controlling oscillating movesaid coderegistered by said combination bars, a 15 ment of said frame.

first frame oscillatable between two limit positions, said frame in oneof said positions prevent- GIUSEPPE BECCIO.

